... Abstract We present two methods to measure contact angles inside porous media using high-resolution images. The direct determination of contact angle at the three-phase contact line is often ambiguous due to uncertainties with image segmentation. Instead, we propose two alternative approaches...

...-MoS 2 nanosheets. Experimental results indicate that the oil-wet solid surface (a contact angle of 130°) can transform into the neutral-wet solid surface (a contact angle of 90°) within 120 hrs after 50 mg/L ODA-MoS 2 nanosheets treatment. In addition, micro-scale emulsions in size of 2 µm can...

... imbibition. The IFT decreased to 1.79 mN/m upon addition of non-ionic surfactant to low-salinity brine, and it reduced to 2.96 mN/m in a mixture of 3-pentanone and non-ionic surfactant in low-salinity brine. Furthermore, ketone improved the core wettability by reducing the contact angle to 43.9° from 50.7...

... As it was mentioned before, contact angle experiments were performed on calcite pieces and Eagle Ford shale plates. After cutting them in the appropriate sizes, they were polished with a diamond grinder. Then, those calcite and shale pieces were aged for one day in RB and after that, they were...

... (contact angle), which are intrinsically dependent on a variety of factors such as the initial oil saturation, aging conditions, etc. Thus, the use of Amott indices could potentially cloud the observed trends of residual saturation with wettability. Using pore network modeling (PNM), we show that residual...

... of shale samples was verified by measuring contact angles of water droplets in air. Then the samples were immersed in CO 2 or CO 2 -surfactant solution for 16 h at 4000 psi and 80 °C. Contact angle measurements were then performed to identify shifts in wettability. No substantial change in wettability...

... surfaces was confirmed in contact-angle measurements, and yielded the incremental oil recovery in imbibition experiments. This paper presents a surface complexation model (SCM) for the interaction between glycine and oil-wet carbonate surfaces that considers the impact of temperature, pH, salinity...

... the fluid-solid interaction is stronger. The coexistence curves and saturation pressures in nanopores with different fluid-solid force are presented which can be characterized by using contact angle. Finally, the phase behavior in a complex pore structure is calculated. This work illustrates...

... on the relative value of repulsion and attraction controlled by the pore-wall wettability. Finally, the contact angle of the pore surface is calculated by a DLVO theory (describing gas/water/solid interactions) related to the fluid/pore-wall interaction properties. The continuous viscosity profile of fluid...

... and surfactant aided spontaneous imbibition. The low salinity brine composition was optimized using zeta potential, contact angle experiments, and wettability index calculations. Significant surface reactions on dolomite rocks were observed at the salinity of 2500 ppm. Thirty-seven surfactants were evaluated...

... into the surrounding matrix. One is 3-pentanone, a symmetric short ketone, and the other is 2-ethylhexanol-4PO-15EO, a non-ionic surfactant with an ultra-short hydrophobe. They were used as low-concentration additives (approximately 1 wt%) to reservoir brine (RB) in this research. Contact-angle experiments with oil...

... saturation Fluid Dynamics Wolfcamp oil saturation flow in porous media concentration contact angle enhanced recovery final oil saturation experiment surfactant injection surfactant solution Oil Recovery flowback saturation permeability friction reducer injection nanofluidic analysis...

... Abstract In this paper, contact angles in a rock/heavy-oil/steam system were measured to observe the degree of wettability alteration when unconventional chemicals were added to steam. A heavy-crude-oil obtained from a field in Alberta (27,780 cP at 25°C) was used in all contact angle...

... that increase waterflooding oil recovery in carbonate reservoirs. All experiments used a heavy-oil sample taken from a carbonate reservoir. Two amino acids were tested, glycine and β-alanine. Contact angle experiments with oil-aged calcite were performed at room temperature with deionized water...

... continuously. The IFT was then calculated through matching the droplet shape profile to the Laplace equation using the oil density and aqueous solutions at reservoir temperature. Contact Angle Measurements Contact angles were measured with Dataphysics OCA 15 Pro using the captive bubble method. Aged...

... experiments, zeta potential, contact angle, interfacial tension (IFT), and pH measurements at ambient and reservoir conditions were performed to investigate the influence of the rock composition and brine/CO 2 mixtures at different pH values for low salinity water-CO 2 EOR (LSW-CO 2 EOR) applications...

... stability evolution fracture Upstream Oil & Gas contact angle foam propagation formulation foam stability propagation complex reservoir criteria instability wettability foam steady state regime destabilization society of petroleum engineers vial foam destabilization half-life time...

... the solid and compute, using an automated method, the contact angle ( Alratrout et al., 2017 , 2018 ). Although not presented here (see, Lin et al ., 2019a ; Alhammadi et al ., 2019 ), we can also quantify interfacial areas and connectivity (or Euler characteristic). This sophisticated image...

... concentration optimum salinity surfactant formulation Upstream Oil & Gas sandpack recovery factor injection oil sand complex reservoir emulsion contact angle ASB NaCl microemulsion ionic liquid Oil Recovery surface tension Introduction Heavy oil reserves are very large and count...

... gave indicative suggestions on the selection of surfactant and engineering application design for a surfactant based EOR project in shale oil reservoirs. Upstream Oil & Gas enhanced recovery experiment ift surf contact angle recovery factor imbibition core plug spontaneous imbibition...